WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

G05F　SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES (regulating the timing or recurrence frequency of pulses in radar or radio navigation systems G01S; closed-loop systems for regulating non-electric variables by electric means G05D; regulating power supply of digital computers G06F 1/26; regulating electric power distribution networks H02J; regulating the charging of batteries H02J 7/00; regulation of the output of static converters, e.g. switching regulators H02M; regulation of the output of electric generators H02N, H02P 9/00, H03L; controlling transformers, reactors or choke coils H02P 13/00; regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers H03G; regulating tuning of resonant circuits H03J; regulating characteristics of transmission lines H04B; electric control of X-ray apparatus H05G 1/30)

G05F 1/00 Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems

G05F 1/02 ・Regulating electric characteristics of arcs (arrangements for feeding electrodes B23K 9/12, H05B 7/109, H05B 31/18; automatic control of power for heating by discharge H05B 7/148)

G05F 1/04 ・・by means of saturable magnetic devices

G05F 1/06 ・・by means of discharge tubes

G05F 1/08 ・・by means of semiconductor devices

G05F 1/10 ・Regulating voltage or current (G05F 1/02 takes precedence; for electric railways B60M 3/02)

G05F 1/12 ・・wherein the variable actually regulated by the final control device is ac (G05F 1/625 takes precedence)

G05F 1/13 ・・・using ferroresonant transformers as final control device

G05F 1/14 ・・・using tap transformers or tap changing inductors as final control device

G05F 1/147 ・・・・with motor driven tap switch

G05F 1/153 ・・・・・controlled by discharge tubes or semiconductor devices

G05F 1/16 ・・・・combined with discharge tubes or semiconductor devices

G05F 1/20 ・・・・・semiconductor devices only

G05F 1/22 ・・・・combined with separate magnetic control devices having a controllable degree of saturation

G05F 1/24 ・・・using bucking or boosting transformers as final control devices

G05F 1/247 ・・・・with motor in control circuit

G05F 1/253 ・・・・the transformers including plural windings in series between source and load (G05F 1/247 takes precedence)

G05F 1/26 ・・・・combined with discharge tubes or semiconductor devices

G05F 1/30 ・・・・・semiconductor devices only

G05F 1/32 ・・・using magnetic devices having a controllable degree of saturation as final control devices

G05F 1/325 ・・・・with specific core structure, e.g. gap, aperture, slot, permanent magnet

G05F 1/33 ・・・・with plural windings through which current to be controlled is conducted

G05F 1/335 ・・・・・on different cores

G05F 1/34 ・・・・combined with discharge tubes or semiconductor devices

G05F 1/38 ・・・・・semiconductor devices only

G05F 1/40 ・・・using discharge tubes or semiconductor devices as final control devices

G05F 1/42 ・・・・discharge tubes only

G05F 1/44 ・・・・semiconductor devices only

G05F 1/445 ・・・・・being transistors in series with the load

G05F 1/45 ・・・・・being controlled rectifiers in series with the load

G05F 1/452 ・・・・・・{with pulse-burst modulation control}

G05F 1/455 ・・・・・・with phase control

G05F 1/46 ・・wherein the variable actually regulated by the final control device is dc (G05F 1/625 takes precedence)

G05F 1/461 ・・・{using an operational amplifier as final control device}

G05F 1/462 ・・・{as a function of the requirements of the load, e.g. delay, temperature, specific voltage/current characteristic}

G05F 1/463 ・・・・{Sources providing an output which depends on temperature}

G05F 1/465 ・・・・{Internal voltage generators for integrated circuits, e.g. step down generators}

G05F 1/466 ・・・・{Sources with reduced influence on propagation delay}

G05F 1/467 ・・・・{Sources with noise compensation}

G05F 1/468 ・・・{characterised by reference voltage circuitry, e.g. soft start, remote shutdown}

G05F 1/52 ・・・using discharge tubes in series with the load as final control devices

G05F 1/54 ・・・・additionally controlled by the unregulated supply

G05F 1/56 ・・・using semiconductor devices in series with the load as final control devices (G05F 1/461 takes precedence)

G05F 1/561 ・・・・{Voltage to current converters (amplifiers H03F)}

G05F 1/562 ・・・・{with a threshold detection shunting the control path of the final control device}

G05F 1/563 ・・・・including two stages of regulation at least one of which is output level responsive, e.g. coarse and fine regulation

G05F 1/565 ・・・・sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor (G05F 1/563 takes precedence)

G05F 1/567 ・・・・・for temperature compensation

G05F 1/569 ・・・・・for protection

G05F 1/571 ・・・・・・with overvoltage detector

G05F 1/573 ・・・・・・with overcurrent detector

G05F 1/5735 ・・・・・・・{with foldback current limiting}

G05F 1/575 ・・・・characterised by the feedback circuit

G05F 1/577 ・・・・for plural loads

G05F 1/585 ・・・・・providing voltages of opposite polarities

G05F 1/59 ・・・・including plural semiconductor devices as final control devices for a single load

G05F 1/595 ・・・・・semiconductor devices connected in series

G05F 1/607 ・・・using discharge tubes in parallel with the load as final control devices

G05F 1/61 ・・・・including two stages of regulation, at least one of which is output level responsive

G05F 1/613 ・・・using semiconductor devices in parallel with the load as final control devices (G05F 1/461 takes precedence)

G05F 1/614 ・・・・including two stages of regulation, at least one of which is output level responsive

G05F 1/618 ・・・using semiconductor devices in series and in parallel with the load as final control devices (G05F 1/461 takes precedence)

G05F 1/62 ・・・using bucking or boosting dc sources

G05F 1/625 ・・wherein it is irrelevant whether the variable actually regulated is ac or dc

G05F 1/63 ・・・using variable impedances in series with the load as final control devices

G05F 1/635 ・・・・being Hall effect devices, magnetoresistors or thermistors

G05F 1/644 ・・・・being pressure-sensitive resistors

G05F 1/648 ・・・・being plural resistors among which a selection is made

G05F 1/652 ・・・using variable impedances in parallel with the load as final control devices

G05F 1/656 ・・・using variable impedances in series and in parallel with the load as final control devices

G05F 1/66 ・Regulating electric power

G05F 1/67 ・・to the maximum power available from a generator, e.g. from solar cell

G05F 1/70 ・Regulating power factor; Regulating reactive current or power

G05F 3/00 Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties {(current generators specially designed for use in phase-locked loops H03L 7/0891)}

G05F 3/02 ・Regulating voltage or current

G05F 3/04 ・・wherein the variable is ac

G05F 3/06 ・・・using combinations of saturated and unsaturated inductive devices, e.g. combined with resonant circuit

G05F 3/08 ・・wherein the variable is dc

G05F 3/10 ・・・using uncontrolled devices with non-linear characteristics

G05F 3/12 ・・・・being glow discharge tubes

G05F 3/16 ・・・・being semiconductor devices

G05F 3/18 ・・・・・using Zener diodes

G05F 3/185 ・・・・・・{and field-effect transistors}

G05F 3/20 ・・・・・using diode- transistor combinations (G05F 3/18 takes precedence)

G05F 3/205 ・・・・・・{Substrate bias-voltage generators (for static stores G11C 5/146)}

G05F 3/22 ・・・・・・wherein the transistors are of the bipolar type only (G05F 3/26, G05F 3/30 take precedence)

G05F 3/222 ・・・・・・・{with compensation for device parameters, e.g. Early effect, gain, manufacturing process, or external variations, e.g. temperature, loading, supply voltage}

G05F 3/225 ・・・・・・・・{producing a current or voltage as a predetermined function of the temperature}

G05F 3/227 ・・・・・・・・{producing a current or voltage as a predetermined function of the supply voltage}

G05F 3/24 ・・・・・・wherein the transistors are of the field-effect type only (G05F 3/205, G05F 3/26, G05F 3/30 take precedence)

G05F 3/242 ・・・・・・・{with compensation for device parameters, e.g. channel width modulation, threshold voltage, processing, or external variations, e.g. temperature, loading, supply voltage}

G05F 3/245 ・・・・・・・・{producing a voltage or current as a predetermined function of the temperature}

G05F 3/247 ・・・・・・・・{producing a voltage or current as a predetermined function of the supply voltage}

G05F 3/26 ・・・・・・Current mirrors

G05F 3/262 ・・・・・・・{using field-effect transistors only}

G05F 3/265 ・・・・・・・{using bipolar transistors only}

G05F 3/267 ・・・・・・・{using both bipolar and field-effect technology}

G05F 3/30 ・・・・・・Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities (G05F 3/26 takes precedence)

G05F 5/00 Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output

G05F 7/00 Regulating magnetic variables (details of apparatus for measuring magnetic variables involving magnetic resonance G01R 33/28)